package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetMealDishMapper setMealDishMapper;
    @Transactional
    /**
     * 新增菜品接口
     */
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.save(dish);
        Long id = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors.size()!=0 && flavors != null){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(id);
            }
            dishFlavorMapper.saveFlavors(flavors);
        }

    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult startPage(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 菜品批量删除
     * @param ids
     */
    public void deleteByIds(List<Long> ids) {
        //是否处于起售
        for (Long id : ids) {
            Dish dish=dishMapper.getById(id);
            if (dish.getStatus()!=0){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //是否关联套餐
        List<Long> meals=setmealMapper.getSetMealByIds(ids);
        if (meals != null&& meals.size() !=0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        for (Long id : ids) {
            //删除菜品
            dishMapper.deleteById(id);
            //删除菜品对应的口味
            dishFlavorMapper.deleteByDishId(id);
        }

    }

    /**
     * 根据id查询菜品
     *
     * @param id
     * @return
     */
    public DishVO getById(Long id) {
        Dish dish = dishMapper.getById(id);
        List<DishFlavor> flavors=dishFlavorMapper.getByDishId(id);
        DishVO dishVO =new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(flavors);
        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     * @return
     */
    public void updateDish(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.updateDish(dish);
        List<DishFlavor> flavors = dishDTO.getFlavors();
        Long id = dishDTO.getId();
        dishFlavorMapper.deleteByDishId(id);
        if (flavors.size()!=0 && flavors != null){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(id);
            }
            dishFlavorMapper.saveFlavors(flavors);
        }
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 菜品起售与停售
     * @param status
     * @param id
     */
    public void startAndStop(Integer status, Long id) {
        Dish dish=new Dish();
        dish.setStatus(status);
        dish.setId(id);
        dishMapper.updateDish(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


}
